pop up information in f-43

Hi All,

while posting the duplicate invoice  i am getting warning message as  ' check, wethere  invoice was already entered with number xxxxxx".

my requirement is to make it as pop-up message. i tried to change the message type in t-code OBA5. It is showing only warning and error message type.

Is there any other way to display the message as pop-up.?

awaiting your replies.

Thanks,

Srin.